Melt processable polyacrylonitrile copolymer precursors for carbon fibers: Rheological, thermal, and mechanical properties
- Melt processable polyacrylonitrile copolymer precursors for carbon fibers: Rheological, thermal, and mechanical properties
- 구본철; 유남호; 박세준; 최달수; 진정운; 이재혁; 정용식; 여현욱
- Carbon fiber; Melt spinning; Polyacrylonitrile; Stabilization; Electron Beam; Mechanical properties
- Issue Date
- Journal of industrial and engineering chemistry
- VOL 71-118
- Polyacrylonitrile (PAN) copolymers containing varying amounts of methyl acrylate (MA), P(AN-co-MA),were synthesized as a melt-spinnable precursor of carbon fibers. The rheological properties of P(AN-co-MA) with MA content of 15 mol% at 190 C proved to be suitable for melt-spinning and the PAN fiber was spun from an extruder. In order to prevent remelting and fusion of the
fibers in the stabilization process, electron-beam irradiation of over 1500 kGy was used and the melt-spun PAN fibers were successfully converted to stabilized PAN fibers by thermal treatment up to 250 C. Finally, carbon fibers (CFs) were produced by pyrolysis of the stabilized PAN
fibers. The mechanical properties of the resulting-CFs were evaluated; the tensile strength, tensile modulus, and elongation at break were 1.37 0.2 GPa, 110 11.1 GPa, and 1.27 0.28%, respectively. These results suggest the possibility of utilizing meltspinning as a cost-efficient method for fabrication of carbon fibers.
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